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The effect of angle on dovetail fretting experiments in Ti-6AI-4V
The objective of this work was to compare the fretting fatigue performance of T1-6Al-4V dovetail specimens on Ti-6Al-4V pads having various contact angles typical of engine hardware; 35 degree, 45 degree and 55 degree dovetail angles were considered. The dovetail fixtures were instrumented with strain gages so that the local normal and shear contact forces could be calculated. The contact force hysteresis loops were recorded showing the stick-slip history. At R = 0.1, gross slip was observed for several thousand cycles followed by partial slip after the average coefficient of friction increased. At R = 0.5, gross slip was present only during the first half cycle. During partial slip, the slope of the shear versus normal force was a function of the dovetail angle. The local contact loads, therefore, differed for the same remotely applied force. Despite this, the fretting fatigue life depended primarily on the remotely applied load not dovetail angle.
The effect of angle on dovetail fretting experiments in Ti-6AI-4V
The objective of this work was to compare the fretting fatigue performance of T1-6Al-4V dovetail specimens on Ti-6Al-4V pads having various contact angles typical of engine hardware; 35 degree, 45 degree and 55 degree dovetail angles were considered. The dovetail fixtures were instrumented with strain gages so that the local normal and shear contact forces could be calculated. The contact force hysteresis loops were recorded showing the stick-slip history. At R = 0.1, gross slip was observed for several thousand cycles followed by partial slip after the average coefficient of friction increased. At R = 0.5, gross slip was present only during the first half cycle. During partial slip, the slope of the shear versus normal force was a function of the dovetail angle. The local contact loads, therefore, differed for the same remotely applied force. Despite this, the fretting fatigue life depended primarily on the remotely applied load not dovetail angle.
The effect of angle on dovetail fretting experiments in Ti-6AI-4V
Golden, P.J. (author) / Nicholas, T. (author)
Fatigue and Fracture of Engineering Materials and Structures ; 28 ; 1169-1175
2005
7 Seiten, 14 Quellen
Article (Journal)
English
The effect of angle on dovetail fretting experiments in Ti-6Al-4V
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